Perpetual calendar



Aug. 5, 1952 L. BERKOWER PERPETUAL CALENDAR Filed July 26, 1947 2 SHEETS-SHEET l Flag-'5% 30 LOU I S BERKOWER ATTORNEY.

Aug. 5, 1952 L. BERKowl-:R 2,605,567

PERPETUAL CALENDAR Filed July 26, 194'? 2 SHEETS-smi' z IIIZIB /0 /N Vf/v TOR.

LOUIS BERKOWER /QATToR/vfy.

Patented Aug. 5, 1952 UNITED" STATES PATENT" OFFICE Louis Berkower, Bronx, N. Y. n Application July Z6, 1947, Serial No. 763,885.'

This invention relates to calendars, and more particularly tol perpetual calendars, and still more particularly to calendars which may be made of sheet material.

The object of my invention isto provide a calendar which may be made of relatively inexpensive sheet material, such as sheet Celluloid or glazed sheet metal or cardboard wherein there is provided a mounting sheet and a slide, which members, in relation to each other, may outline through a window all possible combinations of indicia outlining the month, to provide a perpetual calendar.

y Inthemore specific phase of my invention, it is contemplated by me to provide a perpetual calendar having a mounting sheet which outlines a windowy or mask, the size corresponding to an outline of seven columns and six rows whereby the window may mask a slide carrying indicia arranged uniformly in the form of thirteen columns and six rows.,` whereby a relative slidable movement of the slide to the mask will make visible through the window seven columns and six rows selected from the thirteen columns and six rows of iigures, whereby any predetermined month of the year correlating the days thereof coincident with the actual day and week may be obtained during any month or year.

Still moreparticularly, it is an object of my invention to provide a perpetual calendar which may be made of simple stampings and efliciently and inexpensively serve the intended purpose.

To attain these objects and such further objects as may appear herein or be hereinafter pointed out, I make reference to the accompanying drawing forming a part hereof, in which:

Figure lis an exploded perspective view of one embodiment of my invention;

Figure 2 is a vfragmentary assembled view in one position thereof;

Figure 3 is a fragmentary perspective View in another position;

Figure 4 is a partial perspective view of another embodiment of my invention;

Figure 5 is a fragmentary sectional view taken on the line 5-5 of Figure 2.

Making reference to the drawing, it is contemplated by me to provide a perpetual calendar in which a slide I0 includes a composite calendar Il comprising indicia outlining the days of the month by employing columns I2 which are thirteen in number, and rows I3 which are six in number, with the seventh row I4 including provision for designating intelligence hereinafter more specifically described, f

3 Claims. (01.40-109) The l"arrangement of a composite monthly calendar is predicated upon the possibility that with the masking out of all but seven of the columns, all of the days of the month may be portrayed and by merely correlating the numerals with some iixed relationship corresponding to the days of the week, any possible arrangement of the calendar may be secured.

In accordance with the more specific embodiment of my invention, I'outline a slide I0 in the form of aquadrant' whose upper edge I5 and lower edge I6 are concentric, with a common center. The sides edges I'I and I8, respectively, extend to each edge of the vertical columns I 2, as will appear more clearly hereinafter.

With a slide Voi the -character described, I provide a cover or mounting member I9. I form a mask therefrom by the vertical slits 20 and 2I, so that the edges 22 and 23 outline the side edges and the endsy 24 provide the upper and lower extremities. The spacial position of the sides 22 and 23 corresponds to the special position of seven columns I2 on the slide IU. The slits so formed provide a medially positioned web 25 for purposes which will appear hereinafter. In the construction provided I outline a zone 26 which is divided into seven segments 21, each having indicia outlining the days of the week, beginning with Sunday and ending with Saturday.

With the construction thus described, I may thread the slide II into the slits 22 and 23 to guide the upper edge I Sadjacent the upper ends 24 and 24 of the slits and to guide the lower edge adjacent the lower ends 24 and 24. Under these conditions, the' mounting I9 serves as a guide to hold the slide I0 bythe distortion with respect to each other of the web 25 and the main body of the mounting I9, as will more clearly appear from an inspection of Figure 5. Sliding action of the slide with respect to the window dened by the edges 22, 23 will permit the date indicia to be in the form of columns and rows to be visible within limits corresponding to seven days of thefwe'ek.r

In the embodiment illustrated I have made the mounting sheet I9 of general angular outline so that the edges 28 and 29 conform to the edges I1 and I8 in angular position. The displacement between the edges 28 and 29 plus the overhang beyond the columns previously described is such that in either'extreme position of the slide, the edges II and`2`8,'and. I8 and 29 may be made coterminous and rthereby actJ as limiting guides for sliding movement to either extreme position.

As an additional feature, I include a disk 30` which is divided into twelve segments 3l, each having indicia corresponding to the months of the year, with further indicia 32 to outline the number of days in the month as they may vary from twently-eight to thirty-one. A bearing hole 33 is provided for alignment with the bearing aperture 34 on the mounting sheet, a cutout 35 being provided to mask the segments 3| upon alignment of the bearing hole 33 and bearing aperture 34. A trunnion in the form of a bolt 36 whose shank is screwthreaded, aligns the disk 33 through the bearing hole 33 and bearing 34. A knurled head 31 and nut 38 are provided to frictionally tension the disk in any angular position.

In the embodiment illustrated, I have located the bearing 34 within the limits of the slits 20, 2| between the ends 24 and 24 thereof. In such construction I prefer to provide a guide slot 39 in the slide le, the slide concentric with the edges I5 and i6 and whose extreme ends 4D, 40 extend for a distance corresponding to six columnar spaces. The location of the guide slot 38 is complementary to the bearing 34 and the radial position of the hub 33 from the cutout 35.

Upon assembly of the slide i5 lwith the backing sheet i9, the fastening bolt is iirst passed through the slot 39 and then through the bearing hole 34 and the bearing hole 33, before attaching the nut 33. In this way it will be observed that the common fastening element serves the multiple purpose of a trunnion for the disk 30 and a limiting guide for-the slide l which, upon tensioning of the knurled head 31, flxedly holds the disk, slide and mounting sheet I3 with relation to each other after an adjustment has been made.

In the embodiment illustrated in Figures 1 to 3, a perpetual calendar disclosing a single month has been exemplied. I may, however, combine a group of such slide assemblies and mountings as more clearly illustrated in Figure 4, whereby three consecutive months may be assembled on a single mounting backing.

In the illustration, the backing sheet 4| of rectangular1 outline is chosen and is provided with slits 42, 43, leaving a web 44 and a masking area dened by the edges 45, 46. Masking apertures of similar construction 41 and 48 are provided. Each of the masking areas 45, 41 and 48 is provided with slides 49, D and 5|, respectively, guided within slits of the same construction as in the prior embodiment, with the modication to take care of the rectangular outline of the slits in parallelism with each other instead of radially positioned as in the embodiment illustrated in Figures l, 2 `and 3. Each of the slides 49, 50 and 5l is provided with guide slots 52 which cooperate with the fastening element 53 to frictionally hold the slide in any adjusted position.

The slide 49 may have associated with it the disk 54 adjacent the cutout 55, to have the common fastening element 53 pivotally mount the disk 54 while limiting the sliding movement of the slide 49 to the limits of the guide slot 52. The slides 59 and Y5| may have associated therewith month indicating disks 56 and 51, respectively, by fastening elements 58 and 59 adjacent Cutouts 6B and 6| to view the months indicated on the disks 5E, 51. Cutouts 62, 63 provide clearance for the ngers tol manipulate the disks to a new radial position, while permitting the bottom edge 64 to rest on a :dat surface, should the calendar be employed as a supporting base in show card fashion.

It will thus be observed that I have provided a perpetual calendar which is simple in construction, inexpensive to manufacture, and by the expedients described I obtain a slide which rigidly holds the sliding members for the monthly adjustment which is necessary to place the calendar into use. Thus, by the employment of Celluloid or like sheeting, cardboard, metal and paper composites` or etched thin sheet metal, I take advantage of the resiliency of the sheet material to secure a frictional engagement'for the slide and mount. Th'e'relative adjustment of the slides to the respective windows need not be more fully described to secure a perpetual calendar adjustment as this will be clearly apparent.

Having thus described my invention and illustrated its use, what I claim as new and desire to secure by Letters Patent, is:

l. A perpetual calendar comprising, in combination, a slide of rigid sheet material having outlined thereon columns and rows of indicia to outline the days of the month, to outline thirteen columns and six rows, a cover member of sheet material cut away to form a window uncovering seven columns transversely revealing all the rows, said window being outlined by a pair ofslits in parallelism to the columns, extending substantially the height of the slide to provide front and rear guides for the slide, the ends of the slits forming edge guides for the slide Valong the rows of indicia of the slide, the movement of the slide for six columnar positions along the rows revealing a month of gures through said window, a pivot member on said rear guide, a disk having radially outlined indicia for the various months of the year revolubly mounted on said pivot, said cover having a cutout to unmask said disk at a portion thereof, said pivot member passing through said disk and slide, stop portions for said slide comprising a guide slot thereon, the ends whereof form stops for said pivot, said guide slot having its ends spaced apart for a distance of six columnar positions on said slide. 1

2. AA perpetual calendar comprising, in combination, a slide'of rigid sheet material having outlined thereon columns and rows of indicia to outline the days of the month, to outline thirteen columns and six rows, a Cover member oi sheet material cut away to form a window uncovering seven columns transversely revealing all the rows, the window being outlined by a pair of slits in parallelism to the columns, extending substantially the height of the slide to provide iront and rear guides for the slide, the ends of the slits forming edge guides for the slide along the rows of Vindicia of the slide, the movement of the slide for six columnar positions along the rows revealing a month of iigures through said window, a pivot member on said Vrear guide, a disk having radially outlined indicia for the various months of the year trunnioned on said rear guide, said pivot extending from said slide and serving as a cover member to said disk and slide, a guide slot on said slide having its end portion spaced apart for a distance of six columnar positions of said slide and screw threaded means for said pivot to lock said disk and slide in predetermined position.

3. A perpetual calendar comprising, in combination, a slide of rigid sheet material having outlined thereon columns and rows of indicia to outline the days of the month, to outline thirteen columns and six rows, a cover member ci sheet material cut away to form a window uncovering seven columns transversely revealing all the rows, the window being outlined by a pair lof slits in parallelism to the columns, extending substantially the height of the slide to provide front and rear guides for the slide, the ends of the slits forming edge guides for the slide along the rows of indicia of the slide, the movement of the slide for six columnar positions along the rows revealing a month of figures through said window, a pivot member extending normally through the rear guide and centrally of the window defined by the slits, a disk trunnioned on said pivot having radially outlined indicia for the various months of the year revolubly mounted thereon and positioned with respect to the cover member to extend adjacent the perimeter of the slide, a cutout portion on the cover member to mask all but a month outlining indicia on said disk, said slide having a slot spanning said pivot extending the length of six columns of said slide, to restrict the exposure of said slide through said window to seven columns of indicia thereon.

LOUIS BERKOWER.

6 REFERENCES CITED The following references are of record in the iile of this patent:

UNITED STATES PATENTS Number Name Date 73,315 Flather Jan. 14, 1868 749,528 Cheape Jan. 12, 1904 1,285,038 Chance Nov. 19, 1918 1,378,857 Gulline May 24, 1921 1,494,792 Lichter May 20, 1924 1,558,020 Lauer Oct. 20, 1925 1,683,907 Mann Sept. 11, 1928 2,057,523 Henry Oct. 13, 1936 2,246,633 Lawlor June 24, 1941 FOREIGN PATENTS Number Country Date 19,894 Great Britain Sept. 20, 1898 

